Fire extinguisher



7 March '29; 1932.

A. B, PHISTER 1,851,056

FIRE EXTINGUISHER Filed Jan. 9, 1928 g INVEN TOR. I 4 :0: mama! aaflw rM 2 'A TTORNEY.

Patented Mar. 29, 1932 UNITED STATES PATENToFF 'C if:

ALBERT B.1?HISTER,OF FORTTHOMAS, xnnrucxznssrenon To THE ;Hrsms mw;

FAGTURING COMPANY, or CINCINNATI, 01110, A conronar on on nnnawnnn- FIREnxrrneursnnn Application filed January 9, 1928. Serial No. 245,286.

My invention relates to' fire extinguisher casings, and particularly tothe heads thereof.

In the past it has been customary in making fire extinguishers toprovide a tubular shell, a convex sheet metal head which is soldered tothe shell, and a reinforced neck which is used for a charging orificeand retainer for the cap, and which is soldered by means I of an annularflange extending from the lower annular edge ofthe neck within a centralopening in the sheet head. The handles with which the extinguisher istransported or hung have been inserted and soldered in holes in the headas hasbeen the discharge conduit.

The many soldered joints in holes in the thin sheet heads have been asource of weakness in the permanence of the extinguishers, because oftheir liability to leakage, Further, the expense required for hand laborin their manufacture has been great.

It is the object of my lnvention to provide a convex head formed from ametal cast ng which will have a neck portion integrally formed with. it.Further, it is my object to also cast integrally with the head adischarge portion to which a discharge conduit maybe readily threaded,if desired; I furtherhave as an object to cast integrally with the heada support extending outwardly from the periphery of the head which maybe drilled for the inserting of carrying handles without it beingnecessary to drill through the head, thereby communicating with theinterior and making a source of possible leakage. '-Another object isthe provision of a channel in the periphery of the lower edge of theintegrally cast head which will retain a flaring flange of the upperannular edge of the shell. A still further object is the provision ofcast lugs within the head which may be usedto bend over and therebyretain'a screen. adjacent of the discharge orifice. The above and otherobjects to which reference will be made during the ensuing disclosure Iaccomplish by that certain combination and arrangement of parts of'whichI have shown a preferred embodiment.

Referring to the drawings v V V I Figure l is a plan view of a fireextinguisher 50 showing my novel casing structure.

head and side walls.

Figur'e2gis, a vertical section taken :along';

the lines 22 in Figure 1. V

Figure 3 is a detail :sectionon an enlarged scale showing the connectionbetweenthe Figure .4 is a detailedview of a portion. of the head fromwithin showing the screen supportu, i r

' Fig. 4a is an enlarged fragmentary view of thecast recess for thescreen. 7 i

porting means.

Figure 5 ma fragmentary plan vlew of the r 'extmguishershowinga modifiedform ofsup- The she ll-.1 forming the main bo y of I container, 1sprovided atits base with a-spunmetal bottom 2having annular flanged portions 3 which are soldered to the interiorwalls r of the :shell. Anextensionv .4 forms isup-i porting base The head :is iormed-withlarr'integral casting comprising the.-concave1disk.-'

like. portion 5 withytheneck: 5a; integrally cast,

therewith. 'f

The, lower. annularedge of the provided with an-annular groove 6a inwhichan annular flange 7 0% the shell 1 is securely soldered; Beforesoldering .tli'eouter lipot the groove is turned inwardly as indicated.Aninturned flange .8 extending inwardly trom the base-of the necksupports a cage?) which, supports a receptacle 9a which :con-' .tainsachemicalr 'The containernis supplied with another chemical which,whenthe con tamer-is 1I'1V8I't6d,-. is acted on :by xthefirstchemicalforming :gas which generates pressure and :the liquid in theextinguisher-is projected through the nozzle.

- Theghosefz'tO has a coupling piece into Wlricha nipple 11 is -'screwed is screwed into athreaded apertureTQF'in' :the-ca'st extension 13'ofth'e head.' The in-' ternal side of the head also has a recessedportion 14 integrally cast therewith with lugs 15 which are used to bendover and secure a screen'lfi which prevents any sediment a from beingthrown onto thefire or blocking 17 which, when the extinguisher isinverted,

falls out of the neck, thereby releasing the contents.

The exterior periphery of the neck 5a is threaded as indicated at 18,and a cap member 19 is thereby secured on the neck. A flexible gasketprovides a seal which prevents leakage.

Extending from the outer periphery of the cap I further cast the lugs 20which may be drilled out for retaining the shanks 21 of the handle 22.In some modifications the carrying handle is not required, sothat thelugs 20 may be cast as an eye, thereby providing means by which theextinguisher may be supported. Such a modification is indicated inFigure 5 in which the lugs 20a form an eye 20?).

The principle of supporting a chemical container in an extinguisher withliquid which will efi'ervesce with the'invertion of the container is oldand well lmown, and I make no claim to the principle of operation of thetype of extinguisher illustrated.

Having-thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. .In combination with a fire extinguisher casing having a tubularshell, a cast head with a neck integrally formed therewith, a dischargeconduithaving a passage extending .fromithe interior of the extinguishercasing in substantial alignment with the side walls of the casing andintegrally formed with said head, said head further having a recessedportion with lugs cast integrally with said head bent over and retaininga screen formed on the inner face of said head to filter materialprojected through said discharge conduit. I

2. In combination with a fireextinguisher casing having a tubular shell,a cast head with a neck integrally formed therewith, a discharge conduithaving a passage extending from the interior of the extinguisher casingin substantial alignment with the side walls of the casing andintegrally formed with said head, a support extending outwardly from theperipheral edge of the head also integrally cast with said head, and are-- cessed portion with lugs cast'integrally with said head bent overand. retaining a screen formed on the inner face of said head to filtermaterial projected through said dis charge conduit.

ALBERT B. PI-IISTER.

